Table 2.
The effects of hospital referral region diversity on 30-day readmission rates of older adults (n = 4340) 30-day readmission rate.
| Heart Failure |
Pneumonia |
Hip Replacement Surgery |
Acute Myocardial Infarction |
|||||
|---|---|---|---|---|---|---|---|---|
| IRR | 95% CI | IRR | 95% CI | IRR | 95% CI | IRR | 95% CI | |
| Hospital Characteristics | ||||||||
| Hospital ownership (referent: Not-for-profit) | ||||||||
| Government | 1.119* | [1.107,1.132] | 1.074* | [1.060,1.089] | 1.135* | [1.118,1.153] | 1.050* | [1.037,1.064] |
| For-profit | 1.116* | [1.102,1.130] | 1.131* | [1.115,1.148] | 1.035* | [1.017,1.055] | 1.028* | [1.013,1.044] |
| Teaching status (referent: Non-teaching) | ||||||||
| Major | 1.012 | [0.986,1.039] | 1.004 | [0.976,1.034] | 0.968 | [0.930,1.008] | 1.022 | [0.988,1.056] |
| Minor | 0.936* | [0.926,0.946] | 0.964* | [0.952,0.976] | 0.879* | [0.865,0.893] | 0.927* | [0.916,0.939] |
| Part of a system (referent: No) | 0.937* | [0.928,0.946] | 0.940* | [0.929,0.951] | 0.977* | [0.963,0.990] | 0.976* | [0.965,0.986] |
| Hospital size (referent: Large) | ||||||||
| Small | 1.315* | [1.280,1.351] | 1.116* | [1.083,1.150] | 1.405* | [1.346,1.466] | 1.590* | [1.535,1.648] |
| Medium | 1.044* | [1.021,1.068] | 1.016 | [0.991,1.041] | 0.988 | [0.953,1.024] | 1.050* | [1.019,1.081] |
| Rural (referent: Urban) | 0.984* | [0.973,0.995] | 0.969* | [0.956,0.982] | 1.062* | [1.045,1.079] | 1.085* | [1.072,1.099] |
| Hospital Medicare percentage | 0.998* | [0.998,0.998] | 0.998* | [0.997,0.998] | 1.000* | [0.999,1.000] | 0.999* | [0.999,0.999] |
| Hospital Medicaid percentage | 1.000 | [0.999,1.000] | 0.998* | [0.998,0.999] | 1.002* | [1.001,1.002] | 1.002* | [1.001,1.002] |
| Hospital inpatient days per 1000 | 1.000* | [1.000,1.000] | 1.000 | [1.000,1.000] | 0.999* | [0.999,0.999] | 0.999* | [0.999,0.999] |
| Hospital Referral Region Characteristics | ||||||||
| Entropy Index Score | 1.159* | [1.028,1.306] | 1.258* | [1.111,1.424] | 1.161* | [1.033,1.305] | 1.098* | [1.022,1.180] |
| Median age | 0.994 | [0.986,1.002] | 0.998 | [0.990,1.006] | 0.992* | [0.984,1.000] | 0.994* | [0.990,0.999] |
| Percent with some college education | 0.991 | [0.981,1.001] | 0.988* | [0.978,0.999] | 0.985* | [0.975,0.995] | 0.995 | [0.989,1.001] |
| Percent with bachelors | 1.000 | [0.987,1.013] | 1.001 | [0.988,1.015] | 0.986* | [0.974,0.998] | 0.997 | [0.989,1.004] |
Note: Coefficients; 95% confidence intervals in brackets; * p < 0.05; Non-significant covariates were removed: Unemployment rate, Percent with High School degree, Percent with associate degree, Percent with graduate degree